TREA

Means for inclining the base member of the support

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Industry

  • CPC
  • E21D23/0436
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21DSHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS E21D23/00Mine roof supports for step- by- step movement

Current Industry

E21D23/0436Means for inclining the base member of the support
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Mining roof support frame with base skids lifting device
    • Patent number 7,476,058
    • Issue date Jan 13, 2009
    • DBT Bergbau-Service GmbH
    • Alois Scheunert
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Lift cylinder assembly
    • Patent number 6,991,407
    • Issue date Jan 31, 2006
    • DBT GmbH
    • Friedrich Wilhelm Dannehl
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Hydraulic advancing support frame
    • Patent number 5,961,254
    • Issue date Oct 5, 1999
    • DBT Deutsch Bergbau-Technik GmbH
    • Hans-Otto Friedrichs
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Hydraulic shield support frame
    • Patent number 5,743,679
    • Issue date Apr 28, 1998
    • DBT Deutsche Bergbau-Technik GmbH
    • Georg Gottschlich
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof support
    • Patent number 5,252,006
    • Issue date Oct 12, 1993
    • Westfalia Becorit Industrietechnik GmbH
    • Lubomir Plevak
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Displaceable mine roof support assemblies
    • Patent number 5,238,330
    • Issue date Aug 24, 1993
    • Westfalia Becorit Industrietechnik GmbH
    • Lubomir Plevak
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Walking prop for mine tunnels
    • Patent number 5,190,414
    • Issue date Mar 2, 1993
    • Strebtechnik Bochum GmbH & Co.
    • Hans-Ferdinand Bemmerl
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof support assembly
    • Patent number 5,100,263
    • Issue date Mar 31, 1992
    • Meco Mining Equipment Limited
    • Brian J. Woodford
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof supports
    • Patent number 5,039,257
    • Issue date Aug 13, 1991
    • Gullick Dobson Limited
    • Tom C. Bithell
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof support assembly
    • Patent number 4,940,363
    • Issue date Jul 10, 1990
    • Meco Mining Equipment Limited
    • Stephen A. Brown
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Pit prop with liftable front end
    • Patent number 4,041,715
    • Issue date Aug 16, 1977
    • Klockner-Werke AG
    • Willy Watermann
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Excavation roof support
    • Patent number 3,990,251
    • Issue date Nov 9, 1976
    • Klockner-Werke AG
    • Karl Heinz Wehner
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof support
    • Patent number 3,961,487
    • Issue date Jun 8, 1976
    • Bochumer Eisenhutte Heintzmonn, & Co.
    • Gunter Blumenthal
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3811288
    • Patent number 3,811,288
    • Issue date May 21, 1974
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3748861
    • Patent number 3,748,861
    • Issue date Jul 31, 1973
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents